Melting ferromanganese.



E. HUMBERT.

` MELTING FBRROMANGANESE.

APPLICATION FLED JULY'lB, 1913.

Ll @ljl Patented fune 3%, 19M.

from/Em manganese by exposure to the air is prevented.

What I claim'is l 1. Inthe melting'ot ferro-manganese in an electric furnace, tne maintaining of a covering layer' of carbonaceous material upon' the ferro-manganese While molten.y

'2. Maintaining'a supply ofi-ferrO-manga- ,nese molten in an electric furnace, Withdraw-ing small. quantities of the molten metal from time to time and replacing it withy corresponding quantities of 'solid metal and maintaining a covering of carboiiaceous material on Vthe molten bath to protect the same from Adirect exposure to air When',`theI furnaoelis opened and'to ,cause a consump-v tionl of carbon and thel generation of additional l'heat at such times..

3: Maintaining alsupply of'ferro-mangan'ese molten in an electric furnace of the electrede type, and providingy a covering of car-` bonaceous material for the metal, said cov- {ering extending about the ends of the e1ec. tro'des to Ipermit slight variations of the sur- Jrace of the metal Without material varia.-

' ltions in voltage.

L Maintaining a supply of ,ferro-manga, nese molten in an electrie furnace 'of the electrode type, withdrawing small quantities ofthe molten met-alfrom' time to time and replacing -them with "corresponding quantities of solid metal and maintaininga comparatively thick1 covering ofcarbo-4 naceous materialI on the bath and surroundling the ends of the electrodes sofas to avoid excessive variations in voltage when the sur:

faceof the bath isagitat'ed and so' as to protect the bath from direct contactfwith air when the =furnace is lopened and cause a consumption of carbon anda consequent addition of heat at such times..

In Witness whereof, I have hereunto signed my na'meein the presence of two .subscribing witnesses. t

ERNEST HUMBERT.

Witnesses:

D. ANTHONY Usuari,l LULU STUBENVOLYL. 

